发明名称 |
SINTERED COMPACT AND CUTTING TOOL |
摘要 |
<p>A sintered body containing alumina crystal particles and zirconia crystal particles as main components includes the tetragonal crystal particles as the zirconia crystal particles. The zirconia crystal particles satisfy relations 0%‰¤A‰¤ 3%, 3%‰¤ B‰¤22% and 77%‰¤ C ‰¤96%. A represents a ratio of a number a of first zirconia crystal particles to the total number N of the zirconia crystal particles, wherein each of the first zirconia crystal particles is surrounded by only the zirconia crystal particles. B represents a ratio of a number b of second zirconia crystal particles to the total number N of the zirconia crystal particles, wherein each of the second zirconia crystal particles is surrounded by only the alumina crystal particles. C represents a ratio of a number c of third zirconia crystal particles to the total number N of the zirconia crystal particles, wherein each of the third zirconia crystal particles is surrounded by both the zirconia crystal particle and the alumina crystal particle. N represents a total number of the zirconia crystal particles in a 10 µm square area at any cut plane of the sintered body. The number N is equal to or greater than a value 140.</p> |
申请公布号 |
EP2735556(A1) |
申请公布日期 |
2014.05.28 |
申请号 |
EP20120815313 |
申请日期 |
2012.07.06 |
申请人 |
NGK SPARK PLUG CO., LTD. |
发明人 |
MOTEKI, JUN;KATSU, YUSUKE;TANAKA, KUNIHARU;MITSUOKA, TAKESHI;KUROKI, YOSHIHIRO;KUSANAGI, HIRONOBU |
分类号 |
C04B35/10;B23B27/14;B23C5/16;C04B35/622 |
主分类号 |
C04B35/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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